CN101877856A - Radio resource management method and system - Google Patents
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Abstract
The invention discloses a radio resource management method and a radio resource management system. The method comprises the following steps that: uplink/downlink backhaul sub-frame configuration information of a source node is sent to a target node and the target node distributes a physical resource block (PRB) to an edge user in a cell managed pre se at the uplink/downlink backhaul sub-frame of the source node according to the uplink/downlink backhaul sub-frame configuration information, wherein the source node and the target node are two nodes for controlling neighboring cells with the same frequency in long term evolution advanced (LTE-A) technology; the source node is a relay node (RN); and the target node is the RN, a base station evolution node B (eNB) or a donor base station DeNB. The technical scheme of the invention has the advantages of avoiding the waste of radio resource and improving the system performance.
Description
Technical field
The present invention relates to the mobile communication technology field, particularly relate to a kind of radio resource management method and system.
Background technology
After Long Term Evolution (LTE, the Long Term Evolution) technology of 3GPP, the 3GPP tissue continues the LTE scheme is strengthened, and this technique for enhancing is called the LTE enhancing, and (promptly LTE-A is the follow-up evolution of LTE technology for LTE-A, LTE-Advanced) technology.
For performance requirements such as covering of raising system and cell edge throughputs, in the LTE-A technology, in the framework of Access Network, increased via node (RN, Relay Node).RN can be regarded as the extension of evolution base station (eNB), for system provides more economical covering.RN is connected by wave point with eNB, and it can strengthen covering quality at the edge that eNB covers, and also can dispose the scope of expanding covering outside the eNB overlay area.
Fig. 1 is the schematic diagram of the RN in existing LTE-A networking.As shown in Figure 1, for providing the eNB of wireless access service, RN is called donor base station (DeNB, Donor eNB); Be connected by wireless Un interface between RN and the DeNB, the Uu interface by LTE between RN and the subscriber equipment (UE) is connected; Mobility Management Entity/the gateway of DeNB and core net (EPC) (MME/SGW, Mobility Management Entity/ServingGateway) is connected to UE by the S1 interface provides service; The MME/SGW of RN and core net is connected to UE by the S1 interface service is provided, and this S1 interface is through the DeNB switching, and promptly DeNB is as the forward node of S1 interface.Each RN have and only have and the DeNB of its ownership between the S1/X2 interface, have only an X2 interface between DeNB and the adjacent eNB/DeNB, the X2 interface signaling of all RN under the DeNB is delivered to after the DeNB, is delivered to adjacent eNB/DeNB by an X2 interface.
The problem to be solved in the present invention is under framework shown in Figure 1, how to finish RRM (RRM, Radio Resource Management) optimizing process.In order to say something, simply introduce earlier the correlated process in the LTE system.
Fig. 2 is the load indication process in the prior LTE system.As shown in Figure 2, the load of LTE system indication (Load Information) message is used for carrying out transfer charge and interference coordination information between the neighbor cell of same frequency of different e NB control, provides important information for finishing the RRM process.
Comprise cell information and following three relevant cells (IE) of indication disturbed condition in the load Indication message:
1. uplink interference overload indication information element (UL Interference Overload IndicationIE): by the mode of bitmap file (bitmap), the sub-district of having pointed out message sink node eNB2 is subjected to the degree of the interference of message sending node eNB1 on all Physical Resource Block (PRB).
2. relative arrowband transmitted power cell (RNTP, Relative Narrowband TxPower IE): whether the downlink transmission power that has provided each PRB of message sending node eNB 1 is lower than information such as value that the RNTP thresholding provides and antenna port.
3. up high interference indication information element (UL High Interference Indication IE): by the mode of bitmap, the high interference sensitivity of each PRB of message sending node eNB 1 is provided, indicate the uplink interference of this PRB to be higher than or be lower than certain threshold value, the secondary report of interference sensitivity is provided at each PRB.The eNB2 that receives this message should avoid having indicated the PRB of high interference sensitivity for its cell edge UE distributes transmit leg eNB1 as far as possible.
Above-mentioned three IE are upgraded by new load Indication message, that is to say with the indication information in the load Indication message before the renewal of the indication information in the new load Indication message.
The LTE-A framework has continued the above-mentioned load indication process in the LTE system, promptly controls between two RN of neighbor cell of same frequency or can carry out the transmission of above-mentioned load Indication message between RN and the eNB.
Yet in the LTE-A framework that comprises RN, for fear of self-interference, RN does not send simultaneously and receives, and promptly RN at a time can only send or receive.Link is called backhaul (backhaul) link between DeNB and the RN, and the link between RN and the UE is called access (access) link.At the backhaul link, for DeNB, RN exists with the likeness in form of UE; At the access link, for UE, RN exists with the form of eNB.The descending backhaul subframe that is used for descending backhaul transmission is configured by semi-static mode; The descending backhaul subframe that is used for up backhaul transmission is configured by semi-static mode or is implicitly obtained by descending backhaul subframe by the HARQ timing relationship.The resource that the descending backhaul link of semi-static configuration is used to send control information, if not the transmission of the control information that is used for descending backhaul link, then be used for the transmission of descending backhaul link data information or the transmission of descending access link data information.
Therefore, in the sub-district that RN covers, descending backhaul subframe in these semi-static configurations, UE can not carry out descending reception, this is because the front said that RN can not send and receive simultaneously, the descending backhaul subframe of semi-static configuration is that RN receives the moment from the message of DeNB, and RN can not send to DeNB or UE, so UE can not receive the message from RN.Equally, in the up backhaul subframe of these semi-static configurations, UE can not carry out up transmission, and this is because the up backhaul subframe of semi-static configuration is RN to moment that DeNB sends, this moment, RN can not receive message from DeNB or UE, so UE can not carry out up transmission.
So, although it is the high interference sensitivity that the load Indication message that RN sends has been indicated some PRB, adjacent sub-district for this RN, in the up backhaul subframe of the semi-static configuration of this RN,, its Cell Edge User can not cause interference to the user's that belongs to this RN uplink for distributing the PRB of these high interference sensitivities.Similarly, although the load Indication message that RN sends has indicated some PRB downlink transmission power higher, adjacent sub-district for RN, descending backhaul subframe in the semi-static configuration of this RN, for its edge customer distributes these PRB of downlink transmission powers greatly, can not cause interference to the downlink transfer of its edge customer yet.
But the adjacent sub-district of this RN is under the distribution condition of the up backhaul subframe of unknown this RN, still think that these PRB of scheduling can cause high interference to the user who belongs to this RN, even cause its up transmission to be failed, even thereby these PRB are fit to distribute to its edge customer, also can avoid such distribution, cause waste of radio resources, cause systematic function to descend.Also there is identical situation in descending backhaul subframe.
In sum, in the RRM management process of existing LTE-A, there is waste of radio resources, the situation that systematic function is low.
Summary of the invention
The invention provides a kind of radio resource management scenarios, this method can be avoided waste of radio resources, has improved the performance of system.
The present invention also provides a kind of wireless resource management, and this method can be avoided waste of radio resources, has improved the performance of system.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention discloses a kind of radio resource management method, this method is applicable to that Long Term Evolution strengthens in the LTE-A system, source node and destination node are two nodes of the neighbor cell of the control same frequency among the LTE-A, source node is via node RN, destination node is RN, base station eNB or donor base station DeNB, and this method comprises:
Up/descending backhaul the subframe configuration information of source node is sent to destination node;
Destination node according to described up/descending backhaul subframe configuration information, in the up/descending backhaul subframe of source node, the edge customer of managing in the sub-district for destination node self distributes Physical Resource Block PRB.
Also a kind of wireless resource management of the present invention, this system comprises: sending node and destination node,
Sending node is used for the up/descending backhaul subframe configuration information of source node is sent to destination node;
Destination node, be used for according to described up/descending backhaul subframe configuration information, in the up/descending backhaul subframe of source node, the edge customer of managing in the sub-district for destination node self distributes Physical Resource Block PRB;
Wherein, source node and destination node are two nodes of the neighbor cell of the control same frequency among the LTE-A, and source node is RN, and destination node is RN, eNB or DeNB.
As seen by above-mentioned, this up/descending backhaul subframe configuration information with source node RN of the present invention sends to destination node; Destination node according to described up/descending backhaul subframe configuration information, up/descending backhaul subframe at source node, for destination node self is managed the technical scheme that the edge customer in the sub-district distributes Physical Resource Block PRB, make that destination node can be in the up/descending backhaul subframe of the semi-static configuration of source node, be the indicated Physical Resource Block PRB of edge customer distribution load Indication message in the sub-district of self managing, because RN can not receive and receive simultaneously, therefore distribute like this and also can not cause mutual interference, relative and prior art has been saved Radio Resource, has improved systematic function.
Description of drawings
Fig. 1 is the schematic diagram of the RN in existing LTE-A networking;
Fig. 2 is the load indication process in the prior LTE system;
Fig. 3 is the flow chart of a kind of radio resource management method of the embodiment of the invention;
Fig. 4 is the composition structural representation of a kind of wireless resource management of the embodiment of the invention.
Embodiment
In order to make the purpose, technical solutions and advantages of the present invention clearer, describe the present invention below in conjunction with the drawings and specific embodiments.
Fig. 3 is the flow chart of a kind of radio resource management method of the embodiment of the invention.This method is applicable to that Long Term Evolution strengthens in the LTE-A system, source node and destination node are two nodes of the neighbor cell of the control same frequency among the LTE-A, and source node is via node RN, and destination node is RN, base station eNB or donor base station DeNB, as shown in Figure 3, this method comprises:
Explained two kinds of situations of uplink and downlink in the flow chart shown in Figure 3, implementation method is identical under the both of these case, therefore with "/" the method merging of two kinds of situations is described.
In one embodiment of the invention, by in load indication (Load Information) message that sends to destination node, adding the up backhaul subframe configuration information of source node, the up backhaul subframe configuration information of source node is sent to destination node.
For example, in the load Indication message, increase up link backhaul subframe cell (ULBackhaul Sub-frame IE), comprise four following parameters in this up link backhaul subframe cell: radio frames assignment period parameter, radio frames allocation offsets parameter, a frame configuration parameter and four frame configuration parameters.
Destination node calculates the up backhaul subframe configuration information of source node according to following mode: if parameter=radio frames allocation offsets parameter (here for current System Frame Number mod radio frames assignment period, mod is a mod), then the up backhaul subframe of source node is present in the present frame; Further, if a frame configuration parameter is effective, then the value with in the frame configuration parameter in the present frame is the up backhaul subframe that 1 the pairing subframe of bit is source node; If four frame configuration parameters are effective, then from continuous four frames that present frame begins, with value in the four frame configuration parameters be the up backhaul subframe that 1 the pairing subframe of bit is source node.
After destination node calculates the up backhaul sub-frame configuration situation of source node according to aforesaid way, can ignore content in the up high interference indication information element (UL High Interference Indication IE) in the load Indication message, in the RRM process, indicated the PRB of high interference sensitivity to distribute to edge UE in self sub-district source node.Because source node RN can not send and receive simultaneously, therefore in the up backhaul subframe of source node RN, the UE that source node RN is managed can not carry out up transmission, so the situation of mutual interference mutually can not appear in the UE under the source node RN and the UE under the destination node.
If there is not the up link backhaul subframe cell of increase in the load Indication message, then destination node uses the principle the same with the LTE system to consider the scheduling assignment problem of each PRB.
In invention, also upgrade like up link backhaul subframe cell by new load Indication message with the LTE system class.
Similarly, by at the descending backhaul subframe configuration information that in the load Indication message that destination node sends, adds source node, the descending backhaul subframe configuration information of source node is sent to destination node.
For example, in the load Indication message, increase down link backhaul subframe cell (ULBackhaul Sub-frame IE), comprise four following parameters in this down link backhaul subframe cell: radio frames assignment period parameter, radio frames allocation offsets parameter, a frame configuration parameter and four frame configuration parameters.
Destination node calculates the descending backhaul subframe configuration information of source node according to following mode: if parameter=radio frames allocation offsets parameter (here for current System Frame Number mod radio frames assignment period, mod is a mod), then the descending backhaul subframe of source node is present in the present frame; Further, if a frame configuration parameter is effective, then the value with in the frame configuration parameter in the present frame is the descending backhaul subframe that 1 the pairing subframe of bit is source node; If four frame configuration parameters are effective, then from continuous four frames that present frame begins, with value in the four frame configuration parameters be the descending backhaul subframe that 1 the pairing subframe of bit is source node.
After destination node calculates the descending backhaul sub-frame configuration situation of source node according to aforesaid way, can ignore the relative arrowband transmitted power cell (RNTP in the load Indication message, Relative Narrowband Tx Power IE) content in, in the RRM process, indicated the higher PRB of downlink transmission power to distribute to edge UE in self sub-district source node.Because source node RN can not send and receive simultaneously, therefore in the descending backhaul subframe of source node RN, the UE that source node RN is managed can not carry out descending reception, so the situation of mutual interference mutually can not appear in the UE under the source node RN and the UE under the destination node.
If there is not the down link backhaul subframe cell of increase in the load Indication message, then destination node uses the principle the same with the LTE system to consider the scheduling assignment problem of each PRB.
Equally, in invention, down link backhaul subframe cell is also upgraded by new load Indication message.
In one embodiment of the invention, the up/descending backhaul subframe configuration information by source node RN adds source node in the load Indication message that sends to destination node sends to destination node via the DeNB transfer that service is provided for source node.
Perhaps, in another embodiment of the present invention, source node RN does not increase the up/descending backhaul subframe configuration information of self in the load Indication message, but receiving source node when sending to the load Indication message of destination node by the DeNB that service is provided for source node, in this load Indication message, add the up/descending backhaul subframe configuration information of source node, send to destination node then.
When source node RN quits work (promptly owing to reasons such as the machine of delaying stop to provide service for UE), provide the up/descending backhaul subframe configuration information of the source node that sends before the DeNB notification target node of service to lose efficacy for this source node.Be specifically as follows: provide the DeNB of service to send new load Indication message for this source node to destination node, and the parameter in the Uplink/Downlink backhaul subframe cell wherein is changed to 0, load Indication message with transmission before the expression is inaccurate, is not re-used as the Reference News of adjacent area.
Provide the composition structure of a kind of wireless resource management among the present invention based on the foregoing description.
Fig. 4 is the composition structural representation of a kind of wireless resource management of the embodiment of the invention.As shown in Figure 4, this system comprises: sending node and destination node,
Sending node is used for the up/descending backhaul subframe configuration information of source node is sent to destination node;
Destination node, be used for according to described up/descending backhaul subframe configuration information, in the up/descending backhaul subframe of source node, the edge customer of managing in the sub-district for destination node self distributes Physical Resource Block PRB;
Wherein, source node and destination node are two nodes of the neighbor cell of the control same frequency among the LTE-A, and source node is RN, and destination node is RN, eNB or DeNB.
In system shown in Figure 4, sending node by at the up/descending backhaul subframe configuration information that adds source node in the load Indication message that destination node sends, sends to destination node with the up/descending backhaul subframe configuration information of source node.
In system shown in Figure 4, sending node, be used for adding a cell, in this cell, write following parameter: radio frames assignment period parameter, radio frames allocation offsets parameter, a frame configuration parameter and four frame configuration parameters at the load Indication message that sends to destination node;
Destination node calculates the up/descending backhaul subframe configuration information of source node according to following mode: if current System Frame Number mod radio frames assignment period parameter=radio frames allocation offsets parameter, then source node is up/and descending backhaul subframe is present in the present frame; Further, if a frame configuration parameter is effective, then the value with in the frame configuration parameter in the present frame is up/descending backhaul subframe that 1 the pairing subframe of bit is source node; If four frame configuration parameters are effective, then from continuous four frames that present frame begins, with value in the four frame configuration parameters be up/descending backhaul subframe that 1 the pairing subframe of bit is source node.
In system shown in Figure 4, described sending node is described source node; Perhaps, described sending node is the DeNB that service is provided for described source node.
In system shown in Figure 4, when source node quits work, provide the up/descending backhaul subframe configuration information of the source node that sends before the DeNB notification target node of service to lose efficacy for this source node.
In sum, this up/descending backhaul subframe configuration information with source node RN of the present invention sends to destination node; Destination node according to described up/descending backhaul subframe configuration information, up/descending backhaul subframe at source node, for destination node self is managed the technical scheme that the edge customer in the sub-district distributes Physical Resource Block PRB, make that destination node can be in the up/descending backhaul subframe of the semi-static configuration of source node, be the indicated Physical Resource Block PRB of edge customer distribution load Indication message in the sub-district of self managing, because RN can not receive and receive simultaneously, therefore distribute like this and also can not cause mutual interference, relative and prior art has been saved Radio Resource, has improved systematic function.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (10)
1. radio resource management method, it is characterized in that, this method is applicable to that Long Term Evolution strengthens in the LTE-A system, source node and destination node are two nodes of the neighbor cell of the control same frequency among the LTE-A, source node is via node RN, destination node is RN, base station eNB or donor base station DeNB, and this method comprises:
Up/descending backhaul the subframe configuration information of source node is sent to destination node;
Destination node according to described up/descending backhaul subframe configuration information, in the up/descending backhaul subframe of source node, the edge customer of managing in the sub-district for destination node self distributes Physical Resource Block PRB.
2. method according to claim 1 is characterized in that, described up/descending backhaul subframe configuration information with source node sends to destination node and comprises:
By at the up/descending backhaul subframe configuration information that in the load Indication message that destination node sends, adds source node, the up/descending backhaul subframe configuration information of source node is sent to destination node.
3. method according to claim 2, it is characterized in that, described at the up/descending backhaul subframe configuration information that in the load Indication message that destination node sends, adds source node, the up/descending backhaul subframe configuration information of source node is sent to destination node and comprises:
In the load Indication message that sends to destination node, add a cell, in this cell, write following parameter: radio frames assignment period parameter, radio frames allocation offsets parameter, a frame configuration parameter and four frame configuration parameters;
Destination node calculates the up/descending backhaul subframe configuration information of source node according to following mode: if current System Frame Number mod radio frames assignment period parameter=radio frames allocation offsets parameter, then source node is up/and descending backhaul subframe is present in the present frame; Further, if a frame configuration parameter is effective, then the value with in the frame configuration parameter in the present frame is up/descending backhaul subframe that 1 the pairing subframe of bit is source node; If four frame configuration parameters are effective, then from continuous four frames that present frame begins, with value in the four frame configuration parameters be up/descending backhaul subframe that 1 the pairing subframe of bit is source node.
4. method according to claim 2, it is characterized in that, by at the up/descending backhaul subframe configuration information that in the load Indication message that destination node sends, adds source node, the up/descending backhaul subframe configuration information of source node is sent to destination node and comprises:
After adding the up/descending backhaul subframe configuration information of source node in the load Indication message that sends to destination node, send to destination node by source node;
Perhaps, the DeNB that service is provided for source node is receiving source node when sending to the load Indication message of destination node, adds the up/descending backhaul subframe configuration information of source node in this load Indication message, sends to destination node then.
5. according to each described method in the claim 1 to 4, it is characterized in that this method further comprises:
When source node quits work, provide the up/descending backhaul subframe configuration information of the source node that sends before the DeNB notification target node of service to lose efficacy for this source node.
6. a wireless resource management is characterized in that, this system comprises: sending node and destination node,
Sending node is used for the up/descending backhaul subframe configuration information of source node is sent to destination node;
Destination node, be used for according to described up/descending backhaul subframe configuration information, in the up/descending backhaul subframe of source node, the edge customer of managing in the sub-district for destination node self distributes Physical Resource Block PRB;
Wherein, source node and destination node are two nodes of the neighbor cell of the control same frequency among the LTE-A, and source node is RN, and destination node is RN, eNB or DeNB.
7. system according to claim 6 is characterized in that,
Sending node by at the up/descending backhaul subframe configuration information that adds source node in the load Indication message that destination node sends, sends to destination node with the up/descending backhaul subframe configuration information of source node.
8. system according to claim 7 is characterized in that,
Sending node is used for adding a cell at the load Indication message that sends to destination node, writes following parameter in this cell: radio frames assignment period parameter, radio frames allocation offsets parameter, a frame configuration parameter and four frame configuration parameters;
Destination node calculates the up/descending backhaul subframe configuration information of source node according to following mode: if current System Frame Number mod radio frames assignment period parameter=radio frames allocation offsets parameter, then source node is up/and descending backhaul subframe is present in the present frame; Further, if a frame configuration parameter is effective, then the value with in the frame configuration parameter in the present frame is up/descending backhaul subframe that 1 the pairing subframe of bit is source node; If four frame configuration parameters are effective, then from continuous four frames that present frame begins, with value in the four frame configuration parameters be up/descending backhaul subframe that 1 the pairing subframe of bit is source node.
9. system according to claim 7 is characterized in that,
Described sending node is described source node;
Perhaps, described sending node is the DeNB that service is provided for described source node.
10. according to each described system among the claim 6-9, it is characterized in that,
When source node quits work, provide the up/descending backhaul subframe configuration information of the source node that sends before the DeNB notification target node of service to lose efficacy for this source node.
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